// Converts a Google Sheets website URL to its CSV URL. You can also go to “File → Publish to web”, select the “Comma-separated values (.csv)” type, select the sheet with your data, and use that CSV URL directly with `d3.csv` above. If you need data to update faster, try the Google Sheets API: https://stackoverflow.com/questions/30082277/accessing-a-new-style-public-google-sheet-as-json/44479726#44479726
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